Date: 18/03/2011

Class H VDSL line driver with adjustable quiescent current

Texas Instruments has made available Class H VDSL line driver. TI says this is the first such device and compared to Class AB alternatives, the gated, dual-port THS6226 consumes 47 percent less power, a critical requirement for the high-density VDSL applications used in high-speed broadband networks. THS6226 line driver offers digitally adjustable quiescent current feature. The THS6226 covers all VDSL profiles with a single line driver.

"The best-in-class power consumption of TI's THS6226 VDSL line driver allows Lantiq to deliver a complete VDSL reference system with the enhanced power performance our customers require," said Johannes Eiblmeier, head of marketing of Lantiq's Access Networks Business Unit. "When used together, our newest generation VINAX V3 VDSL chipset and TI's THS6226 set a new benchmark for system power consumption and integration while providing flexibility to use one line card for all VDSL profiles."


The key features of THS6226 line driver:
Single Class H solution provides lowest power consumption for all VDSL profiles, as low as 350 mW for 17a profile.
Adjustable quiescent current of 7.6 mA to 23.5 mA with a current step of 1 mA provides designers flexibility to fine-tune the power control.
Offers low multi-tone power ratio (MTPR) distortion of 70 dB with 19.8 dBm for VDSL2 profile 8b to help maintain signal fidelity.
Integrates an input biasing circuit and all gain and feedback resistors to reduce system board space and cost.
Wide output swing on +12-V power supplies, coupled with excellent current drive, allows for up to 20-dBm output power into the load.

Package: 5-mm x 5-mm QFN package
Price: Each $1.50 in quantities of 1,000